disabling chat bubble in ichat...

does anyone know how to disable or bypass the little bubble that pops up on ichat when someone sends u an IM? I'd like the chat window to just open directly instead of popping up a small bubble in the upper right hand corner first and making me click "accept" first and then the window opens up fully...i'm trying to find the setting to do that but it somehow....won't let me or maybe i'm just blind and not doing this correctly....